Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 72 - CalAmp Proprietary & Confidential

a log retry interval expires. If the log successfully empties, the Retry Schedule is halted and

reset. If not, the LMU will wait for the next retry attempt. When the Log Retry Schedule

expires, then the LMU will only attempt to deliver data when a new record is introduced into

the log, or if the LMU establishes a new data session with the wireless network.

The Log Retry Schedule is based on the state of the LMU’s ignition sense.

The Log Retry Schedule is made up of two values, the number of retry attempts to be made

and the delay between each attempt. For the ignition on case, these settings are controlled by

Parameters 1032 for the number of attempts and 1031 for the delay between each. For the

ignition off case, the number of attempts and their associated delay are controlled by

Parameters 1034 and 1033 respectively.

For example, say you wish to set up an aggressive ignition on Log Retry Schedule of 10

attempts with a 2 minute delay and a fairly passive ignition off Schedule of 1 attempt every

hour over 8 hours. You would use the following four commands:

AT$APP PARAM 1032,0,10

AT$APP PARAM 1031,0,120

AT$APP PARAM 1034,0,8

AT$APP PARAM 1032,0,3600

10.2.4 Using Multiple Inbound Addresses

The LMU-2500™ and LMU-4100™ can support up to 4 Inbound IP Addresses and Port

combinations. This is to allow users to set up back-up servers that the LMU will

automatically report to should the primary system fail. The Inbound IP Addresses are stored

in Parameter 768 and would be programmed using:

AT$APP PARAM 768,<index>,<IP address>

Remember, that for 4 values, the Index would range from 0-3.

Parameter 769 controls the Port values and is programmed using:

AT$APP PARAM 769,<index>,<port>

The Indexes of both these Parameters are tied together. That is, the IP Address for Index 0

will use the Port value of Index 0.

The LMU can also support 2 Inbound URL values which are associated with the 1

and 2

Indexes (0 & 1) of the Inbound IP Address list. That is, a look up on URL 0 will over-write

Inbound IP Address 0 and a look-up on URL 1 will over-write Inbound IP Address 1.

The LMU, from a Power Up, will begin at the first Inbound IP Address. If the LMU fails to

deliver data to this server, then it will roll-over to the next IP Address in the list. This will

continue to happen until the LMU either successfully delivers data (that is, it gets an